Executive Summary

CVE-2023-53982 is a critical SQL injection vulnerability in PMB version 7.4.6. It exists in the 'storage' parameter of the ajax.php endpoint, specifically in the unsanitized 'id' parameter. This flaw allows remote attackers to inject SQL code, including conditional sleep statements, enabling time-based blind SQL injection attacks. Through this, attackers can manipulate database queries to extract sensitive information or perform other unauthorized database operations. [3, 4]

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Impact Analysis

This vulnerability can lead to unauthorized access to sensitive data by allowing attackers to extract information from the database. It can also enable attackers to manipulate or alter data integrity and potentially cause denial of service by locking or delaying database operations. The high CVSS scores indicate a severe impact on confidentiality and integrity, with low impact on availability. [3, 4]

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Detection Guidance

This vulnerability can be detected by testing the 'id' parameter of the ajax.php endpoint with SQL injection payloads that cause time delays, such as conditional sleep statements. For example, using the sqlmap tool with the command: sqlmap -u "http://localhost/pmb/opac_css/ajax.php?categ=storage&datetime=undefined&id=1&module=ajax&sub=save&token=undefined" -p "id" can help identify the SQL injection vulnerability by injecting payloads and observing response delays. [3]

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Mitigation Strategies

Immediate mitigation steps include updating PMB to a version that patches this SQL injection vulnerability, such as versions later than 7.4.6. If an update is not immediately possible, restrict access to the vulnerable ajax.php endpoint, implement web application firewall (WAF) rules to block malicious SQL injection payloads targeting the 'id' parameter, and monitor for suspicious activity. Applying input validation and sanitization on the 'id' parameter is also recommended. [4, 3]

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Compliance Impact

The vulnerability allows remote attackers to extract sensitive information from the database through SQL injection, which can lead to unauthorized access and data leakage. Such data breaches can compromise compliance with data protection regulations like GDPR and HIPAA, which require safeguarding personal and sensitive data against unauthorized access and ensuring data integrity. Therefore, exploitation of this vulnerability could result in non-compliance with these standards due to potential exposure of confidential information. [3, 4]

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